Jack Joseph Osbourne (born 8 November 1985) is an English media personality with dual American and British citizenship. As the son of heavy metal singer Ozzy Osbourne, he starred on MTV's reality series The Osbournes (2002–05), along with his father, mother Sharon, and sister Kelly. Osbourne has since pursued a career as a fitness and travel reporter, presenting shows such as Jack Osbourne: Adrenaline Junkie (2005–09) and BBC's Saving Planet Earth (2007). He was diagnosed with relapsing remitting multiple sclerosis in 2012. In 2016, he and his father Ozzy travelled the world in the History Channel reality series Ozzy & Jack's World Detour.
Osbourne was born in London to heavy metal singer Ozzy Osbourne of Black Sabbath, and his wife and manager, Sharon (née Levy). He has two elder sisters, Aimee and Kelly Osbourne, as well as two paternal half-siblings, Louis John Osbourne and Jessica Hobbs, from his father's previous marriage. Osbourne has stated that his childhood was "perfectly happy and contented". For the first six years of his life, he lived in the Chiltern Hills in Buckinghamshire. When he was six, his parents moved the family to Los Angeles, but a year later the family returned to Buckinghamshire. When Osbourne was 11, the family moved back to Southern California, but this time to Beverly Hills. In spite of moving so many times at a young age, Osbourne did not find it disruptive. His maternal grandfather was Don Arden (Harry Levy), an English music manager.